Molecular modeling with InsightII

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1 Molecular modeling with InsightII Yuk Sham Computational Biology/Biochemistry Consultant Phone: (612) (Walter Library) Phone: (612) (VWL)

2 How to run InsightII I. Log on a Silicon Graphics Workstation or a Linux Workstation in SDVL, BSCL, CGL or VWL II. On the terminal window source /usr/local/accelrys/accelrys.csh insightii

3 Accelrys logo InsightII the viewer Viewer toolbar Frequently Used buttons Module toolbar Frequently used buttons

4 InsightII modules (under Accelrys logo) Builder and Biopolymer (molecular building) Delphi (electrostatic calculation) Solvation (solvent effect) Search and Compare (conformation analysis) Homology (sequence comparison) Decipher and Analysis (numerical analysis and plotting tools) Ludi and Affinity (drug design) NMR refined (NMR noe studies) Discover, Discover3, Charmm (MD simulation) Ampac/Mopac,Dmol,Turomol,Zindo,QuanteMM (semi-empirical calculation) And more.

5 Some nice features of InsightII Import/export multiple file format Molecule editing and building Structure comparison Already has the I/O interface to many popular scientific software Easy definition and selection option High quality graphics Export command scripts Saving your environment

6 Building a molecule with Builder Salicylic acid (aspirin) - Fragment/get in the biopolymer toolbar, fragment window and get fragment panel will pop up - Click Fragment library to display desired fragments - Select fragment, execute - Connect fragment, execute - Repeat last two step until molecule is fully build

7 Building a molecule with Builder

8 Building a molecule with Builder

9 Looking at your molecule Rendering your molecule in different format Molecule/render from the viewer toolbar, Render Molecule and Parameters panel will pop up Under Render Style, select rendering format Go to Molecule Spec, Select molecule from Parameters panel Depending on your format selection, different parameters will appear for each rendering format. Change them to what you like Execute Rendering the Secondary structure of a protein Molecule/secondary render from the viewer toolbar, Secondary Render and Parameters panel will pop up Go to Molecule Name box, Select molecule from Parameters panel Under Render_Operation, select create Under Classify_Source, Toggle on Kabsch_Sander or PDB_Classification Toggle on Helices, Sheets, Turns and Random_Coil Execute (if running insightii without OpenGL, rendering in ribbon, secondary structure, sticks, CPK and ball and Stick format will not work)

10 Rendering formats lines sticks ball and sticks CPK

11 You and your mouse Right mouse click to rotate Middle mouse click to translate Left mouse click and drag to select Mouse point at atom or bond and left mouse click to select atom or bond Left and middle mouse click (together) to change the depth cue Middle and right mouse click (together) to zoom in and out

12 Distance, Angles, Dihedral Measuring distance between two atoms Measure/Distance from the viewer toolbar, Distance panel will pop up Toggle on Monitor Under Monitor Mode, toggle on Add Go to Atom 1 box, point and click first atom from viewer screen Go to Atom 2 box, point and click second atom from viewer screen Measuring angle between three atoms Measure/Distance from the viewer toolbar, Distance panel will pop up Toggle on Monitor Under Monitor Mode, toggle on Add Go to Atom 1 box, point and click first atom from viewer screen Go to Atom 2 box, point and click second atom from viewer screen Go to Atom 3 box, point and click third atom from viewer screen Measuring dihedral angle between three atoms Measure/Distance from the viewer toolbar, Distance panel will pop up Toggle on Monitor Under Monitor Mode, toggle on Add Go to Atom 1 box, point and click first atom from viewer screen Go to Atom 2 box, point and click second atom from viewer screen Go to Atom 3 box, point and click third atom from viewer screen Go to Atom 4 box, point and click fourth atom from viewer screen

13 Loading PDB file in insightii Viewing the biomolecule in pdb file format Molecule/get from the viewer toolbar, Get Molecule and Parameters panel will pop up Toggle on PDB in Get file type Go to Mol File Name box, select the pdb file in parameter panel Give a name in Get Molecule Box Toggle on Heteroatom if you want heteroatoms (eg. Ligand, cofactors, water) to be loaded and display along with the protein execute

14 Loading in a molecule

15 Patching up your protein molecule Patching missing residues Residue/replace from the biopolymer toolbar, Residue Replace panel will pop up In the Residue Replace box, define name of residue (general format is molecule name:residue id) Go to Residue box, select residue type from Parameters panel Define Chirality (L or R) Execute Capping protein chain Protein/cap from the biopolymer toolbar, Cap Protein and Parameters panel will pop up Go to Molecule Name box, select objects in Parameters panel Select C and N cap groups Execute Adding missing hydrogens Modify/hydrogens from the biopolymer toolbar, Hydrogen and Parameters panel will pop up Go to Molecule Spec box, select molecule in Parameter panel Toggle on set_ph, PH_value box will appear Go to PH_value box, enter ph value (enter 7 for neutral environment). Toggle on desired Capping mode Execute

16 Add H sh

17 Coloring Atoms

18 Looking at your molecule Displaying and turning off a specified atom set Molecule/display from the viewer toolbar, Display Molecule and Parameters panel will pop up Under Display Operation, select on or off option Under Molecule attribute, select atoms Click on Atom Set/Specified to find the list of predefined atom set. Select your set. Go to Molecule Spec, Select molecule from Parameters panel Execute Display your molecule as a Ribbon Molecule/ribbon from the viewer toolbar, Ribbon Molecule and parameters panel will pop up Under Ribbon operation, toggle on create Go to Molecule Spec, Select molecule from Parameters panel Under Molecule Type, toggle on Protein Under Ribbon Type, toggle on the desired ribbon format Define ribbon quality under Ribbon Resolution and change ribbon format parameters if necessary Execute

19 Displaying and Rendering

20 Displaying and Rendering

21 Protein Ligand Complex

22 Protein Ligand Interface Binding Site

23 Creating a Connolly surface Creating a Connolly surface Molecule/Surface from the viewer toolbar, Surface Molecule and Parameters panel will pop up Under Surface Operation, toggle on create Under Surface Type, toggle on Connolly Go to Molecule Spec box, select subset from Parameters panel Under Display_Style, select Solid Change parameters for Atom Radius Scale, Atom Radius Incr, Surface Quality if necessary Execute

24 Generating Binding Site Surface

25 Generating Binding Site Surface

26 Display and Rendering Binding Site Residues

27 Labeling

28 Saving your environment file/save_folder in the viewer toolbar, save folder and parameters panel will pop up In Save_Object box, type * Go to Folder_Name box, give a name for your folder Execute Your whole environment is now saved in a file that ends with.psv

29 Learning more about InsightII and its modules on your own Pilot tutorials InsightII Documentation Username: msi Passwd: msi-doc

30 To get help By mail Web Phone Appointment TBA

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